( 461 ) 



APPENDIX. 



HISTORY OF THE SOCIETY. 



( Continued from Vol. VI. p. b8\.) 

 TWENTY-FIFTH SESSION. 



Robert Stevenson, Esq. Vice-President, in the chair The 1831. 



Secretary read a letter, communicated by Dr Gillies, from the ^^' 

 lady of an officer at Malta, containing a sketch of the new vol- 

 canic island, and mentioning some remarkable particulars regard- 

 ing a recent earthquake at Samos. — Professor Jameson then com- 

 municated some interesting facts regarding the new volcanic 

 island, contained in a letter from one of his correspondents. He 

 next made observations on the following subjects : — 1. The oc- 

 currence of what was called a " Shower of Manna" in Persia ; 

 and exhibited specimens of the substance that fell, and which 

 he stated to be a kind of lichen, which being loosely attached 

 to rocks, trees, or the soil, had been carried up into the air 

 by whirlwinds. 2. The discovery by one of his pupils, of a 

 very extensive bed of ligneous debris, near the cit}' of Rome, 

 and which, in primeval times, had constituted a forest there. 

 3. The ascertainment of the fact, that, in the mines of Freyberg, 

 the temperature uniformly increases with the depth of the mine, 



